Key blank



FIG. 1 is a top-front-left perspective view of a key blank, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The shade lines show surface contour and not surface ornamentation. 

CLAIM The ornamental design for a key blank, as shown and described. 